Causes of Car Accidents Accidents in vehicles are frequent and can result in serious injuries. The lives of the victims as well as their families are also affected. These injuries are caused by energy transfer during collision. They include whiplash, head injuries and spinal cord trauma and limb injuries. Driver Errors Whatever the vehicle driver's error is the primary cause of almost every car crash in the United States. Fortunately drivers can avoid these crashes by following safer driving techniques and paying attention to road conditions.